fix: allow all required polkit actions

Author: tomeon

update-systemd-resolved

@@ -1421,7 +1421,10 @@ const updateSystemdResolved = {
     "set-dns-over-tls",
     "set-dnssec",
     "set-dnssec-negative-trust-anchors",
-    "revert"
+    "revert",
+    "flush-caches",
+    "reset-server-features",
+    "reset-statistics"
   ]),
 
   actionIsAllowed: function(action) {